IntroductioniCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)This Service Manual provides basic facts and figures you will need to service the plain paper copierNP6621 in the field.The NP6621 is designed to enable automated copying work and may be configured with the followingaccessory; for servicing information on the sorter, ADF, and control card, see their respective ServiceManuals:1. Cassette Feeding Module-B22. Cassette Feeding Module-A23. Cassette Feeding Unit-K14. Paper Deck Pedestal-K15. Control Card IV N6. ADF-E17. RDF-F18. Stapler Sorter-D19. Sorter 10-B110. Remote Diagnostic Device IIThis Service Manual contains descriptions on the 1-Cassette Feeding Unit-B1 and the 2-Cassette FeedingUnit-A2.Note:The Cassette Feeding Unit-B2, the Cassette Feeding Unit-A2 the cassette feeding Unit K1, the PaperDeck Pedestal-K1 and Remote Diagnostic Device II may not be available for sale in some areas.This Service Manual is organized as follows:CHAPTER 1, “General Introduction,” explains the NP6621’s features, specifications, and step-by-stepinstructions on how to operate the copier.CHAPTER 2, “Copying Processes,” shows how the NP6621 generates copies while discussing each ofthe steps involved.CHAPTER 3, “Operations and Timing,” explains the NP6621’s mechanical system by function andprinciples behind its electrical system in relation to timing of each operation.CHAPTER 4, “Mechanical System,” provides instructions on how to disassemble/assemble and adjust theNP6621.CHAPTER 5, “Installation,” provides points to note when selecting the site of installation and instructionson how to install the NP6621.CHAPTER 6, ‘Maintenance and Inspection,” gives tables of periodically replaced parts and consumables/durables as well as a scheduled servicing chart.APPENDIX contains a general timing chart, general circuit diagrams, and PCB diagrams.This Service Manual is accompanied by the Service Handbook, which provides information on how tomaintain and inspect the NP6621 through adjustment and troubleshooting work.Information found in this manual may be updated from time to time for product improvement, and majorupdates are communicated in the form ofService Information bulletins.All service persons are expected to be thoroughly familiar with this Service Manual, the Service Handbook,and Service Information bulletins and be ready to respond to the needs of the user.
